Hydrogen powered propulsion is not new. In fact it is old.
There is known issue and it is the main obstacle ( which make this propulsion to become at mass)
The known issue is When system produce Hydrogen you need Storage. Then problem is start showing up.
Hydrogen is Extremely Reactive in other words"Hydrogen molecules react with numerous compounds and elements".
At end there is no Hydrogen fuel in you Storage Tank.
Example:
You fuel you car tank with hydrogen and if weather is normally hot "summer" after couple of hours hydrogen fuel just react with you tank material and it fuel is gone.
No fuel No driving.
I think you need to re investigate this issue in detail again.
Atomic Hydrogen is very reactive. But…
Molecular Hydrogen, H2 is very stable especially at room temperature.
To obtain atomic hydrogen you need to pass molecular hydrogen through temperatures in excess of 2500K
Stored hydrogen is molecular hydrogen (H2).
Hydrogen - Reactivity, Uses, Properties: One molecule of hydrogen dissociates into two atoms (H2 → 2H) when an energy equal to or greater than the dissociation energy (i.e., the amount of energy required to break the bond that holds together the atoms in the molecule) is supplied. The...
www.britannica.com
Problem with hydrogen is storage. It has to be kept in high pressure containers to achieve the volume densities needed to get high quantities, for long distance driving.
Hydrogen is difficult to store due to its
low volumetric energy density. It is the lightest of and simplest of all elements, being lighter than helium, and so is easily lost into the atmosphere. Solution lies in high pressure containers.
Hydrogen storage is a key enabling technology for the advancement of hydrogen and fuel cell technologies in power and transportation applications.
www.energy.gov
defencehub.live
interestingengineering.com
www.emobility-engineering.com
